Expanding into adjacent space or building out new square footage is exciting, and the electrical system is rarely the first thing on the checklist. It should be, because it determines what is possible and what it will cost.
Is there capacity for the added space?
More square footage means more lighting, outlets, HVAC and equipment. Check the service size and panel space to see whether the building can support it, or whether a new panel or service upgrade is needed.
How will circuits reach the new area?
Look at where existing electrical rooms are relative to the new space, and what pathways exist. Long runs and tight ceiling spaces increase cost and time.
What will the space be used for?
A conference area, a kitchen, a lab and a warehouse expansion have very different electrical requirements. Define the use before the layout so the electrical plan fits.
What about lighting and controls?
Lighting should match the work done in the space. Decide on fixtures, switching and any emergency or exit lighting at the design stage so they are coordinated with ceilings and partitions.
How will construction affect current operations?
Connecting new circuits to existing panels can mean shutdowns. Phase work so that the part of the business that keeps running has what it needs.
Permits and safety
Expansion work requires permits and inspections through the local authority. A licensed electrical contractor can advise on what applies and how inspections fit the schedule.
Mistakes to avoid
Common ones include designing the layout before understanding the available capacity, forgetting about the shutdowns needed to connect new circuits, and assuming existing panels can absorb the added load. Another is overlooking exit and emergency lighting in the new area.
What to ask a contractor
- What can the existing service and panels support?
- Which circuits will we need for the planned use?
- How will work be phased around current operations?
- Which permits and inspections apply, and who handles them?
Helpful internal resources
These pages describe related services:
Next step
Contact McDaniel Electrical Construction to discuss commercial electrical planning, safety and service needs.